An FDEM study of particle breakage under rotational point loading

Wei, Deheng; Zhao, Budi; Dias-da-Costa, D.; Gan, Yixiang

doi:10.1016/j.engfracmech.2019.03.036

Cited by 45 publications

(12 citation statements)

References 73 publications

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“…The maximum contact force is one of the critical factors that affect the crushing of pebbles [45]. With an increase in the pressing plate displacement, the maximum contact force on each pebble was recorded.…”

Section: P(f_nmentioning

confidence: 99%

Discrete Element Analysis of the Reconstruction Method for Randomly Shaped Pebbles

Liu

Zhao

et al. 2019

IEEE Access

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The pebble shape is a critical factor that affects the bearing characteristics of truck escape ramps. In this paper, a reconstruction method was proposed for randomly shaped pebbles used in truck escape ramps, and statistical analysis was conducted on the results of pebble compression tests. First, 100 pebble samples were randomly selected, and the pebble outlines were fitted in three views. The overlapping method was implemented to fill the three views with ball elements, and the ball elements were then extended into three-dimensions. The results demonstrated that the proposed method satisfactorily monitored the real pebble shapes. Second, statistical analyses were conducted on the parameters of the outlines, and corresponding data sets were built. The key parameters of the pebble DEM model, such as the friction coefficient, were calibrated based on the compression test results, and repeated simulation results verified the feasibility of the proposed pebble DEM model. Next, statistical analysis was conducted on the probability distribution of the contact forces. Third, simulations were conducted with different pressing plate velocities and pebble shapes. The results indicated that the pressing plate velocities had minor effects on the contact forces. As the pressing plate velocity increased, the slope of the contact forces correspondingly increased. The particle shape was a critical factor affecting the simulation results. With the same contact parameters, the simulation results of different pebble shapes varied greatly, which further indicated the importance of the proposed pebble shape reconstruction method. The proposed pebble DEM model could be further used in the design of truck escape ramps. INDEX TERMS Truck escape ramp, randomly shaped pebbles, discrete element method (DEM), contact mechanism, friction coefficient.

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Section: P(f_nmentioning

confidence: 99%

Discrete Element Analysis of the Reconstruction Method for Randomly Shaped Pebbles

Liu

Zhao

et al. 2019

IEEE Access

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“…The first represents techniques in which parent particles are made up of primary particles that are bonded together and that are fully resolved from the beginning of the simulation. Examples of these are the bonded-particle model (BPM) [5,6] in which spheres are used; the discrete grain breakage (DGB) [7,8], the combined finite and discrete element method (FDEM) [9], the cohesive fracture model [10] and the bonded cell method (BCM) [11] which uses polyhedral cells. Additional differences among these are related to the expressions used to represent the failure criteria between individual primary particles, as ⁎ Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

An effective sphere-based model for breakage simulation in DEM

Tavares¹,

Rodriguez²,

Sousani³

et al. 2021

Powder Technology

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“…Zhou et al developed a combined discretefinite element method to simulate the breakage behavior of single particles and verified the reliability of the method [7]. Based on the FDEM method, Wei et al studied the fracture behavior of single-particle breaking under rotational point loading [8].…”

Section: Introductionmentioning

confidence: 99%

Study on Mesoscale Damage Evolution Characteristics of Irregular Sandstone Particles Based on Digital Images and Fractal Theory

Zheng

Zuo

Líu

et al. 2021

Advances in Materials Science and Engineering

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To study the mesoscale damage evolution law of irregular sandstone particles, based on RFPA2D and digital image processing technology, a real mesostructure numerical model of irregular sandstone particles is established to simulate the breakage process of particles, the effects of loading conditions and mesoscale heterogeneity on irregular sandstone particle damage are studied, and the calculation method of fractal dimension of irregular rock particles mesoscale fracture is proposed. The results show that the fracture damage degree (ω) and fractal dimension (D) maximum values of the constrained particles are 0.733 and 1.466, respectively, and the unconstrained particles are 0.577 and 1.153, respectively. The final failure mode of constrained particles is more complicated than unconstrained particles, the damage is more serious, and the fracture is more complete. Thus, the larger values of D yield a more complicated final failure mode of the particles. Consequently, with the larger ω, the final damage is more serious, and the breakage effect is comparatively better. The study is of great significance for exploring the laws of rock particle breakage and energy consumption, rock breakage mechanism, and searching for efficient and energy-saving rock-breaking methods.

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An FDEM study of particle breakage under rotational point loading

Cited by 45 publications

References 73 publications

Discrete Element Analysis of the Reconstruction Method for Randomly Shaped Pebbles

Discrete Element Analysis of the Reconstruction Method for Randomly Shaped Pebbles

An effective sphere-based model for breakage simulation in DEM

Study on Mesoscale Damage Evolution Characteristics of Irregular Sandstone Particles Based on Digital Images and Fractal Theory

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